ECO mode INFINITI QX56 2004 Factory Service Manual

QUICK REFERENCE CHART: QX56
2004

Rear Wheel AlignmentELS0014M
BrakeELS000ZT
Unit: mm (in)
Camber
Degree minute (decimal degree)
Minimum 0
° 0 ′ (0 °)
Nominal - 0 ° 30 ′ (-0.5 °)
Maximum - 1 ° 0 ′ (-1.0 °)
Cross camber 0 ° 45 ′ (0.75 °)
Toe-in Distance (A - B)
Minimum 0 mm (0 in)
Nominal 3.3 mm (0.130 in)
Maximum 6.6 mm (0.260 in)
Cross toe 2 mm (0.079 in)
Angle (left and right)
Degree minute (decimal degree) Minimum 0
° 0 ′ (0 °)
Nominal 0 ° 7 ′ (0.11 °)
Maximum 0 ° 14 ′ (0.22 °)
Cross toe 0 ° 8 ′ (0.14 °)
SFA234AC
Front brake Brake model CLZ31VC
Rotor outer diameter × thickness 320 × 26 (12.60 × 1.02)
Pad Length × width × thickness 111.0 × 73.5 × 9.5 (4.73 × 2.894 × 0.374)
Cylinder bore diameter 51 (2.01)
Rear brake Brake model AD14VE Rotor outer diameter × thickness 320 × 14 (12.60 × 0.55)
Pad Length × width × thickness 83.0 × 33.0 × 8.5 (3.268 × 1.299 × 0.335)
Cylinder bore diameter 48 (1.89)
Control valve Valve model Electric brake force distribution
Brake booster Booster model C215T
Diaphragm diameter 215 (8.46)
Recommended brake fluid Genuine NISSAN Super Heavy Duty Brake Fluid or equivalent,
DOT 3 (US FMVSS No. 116)

DESCRIPTION
ACS-7
[ICC]
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Revision: August 20072004 QX56
System DiagramEKS007RJ
Components DescriptionEKS007RK
CAN CommunicationEKS007RO
SYSTEM DESCRIPTION
Refer to LAN-5, "CAN COMMUNICATION" .
WKIA1976E
ComponentVehicle-to-vehicle
distance control
modeConventional
(fixed speed)
cruise control
modeBrake assist
(with preview
brake)Description
ICC unit×××Controls vehicle speed through ECM via CAN
communication.
ICC sensor××Irradiate laser beam, and receives reflected
laser beam to measure distance from preceding
vehicle.
ECM××Transmits throttle position signal and ICC steer-
ing switch signal to ICC unit.
ABS actuator and electric
unit (control unit)×××Transmits wheel speed signal to ICC unit.
Operates brake booster based on CAN commu-
nication.
Brake pressure sensor××Detects fluid pressure in master cylinder.
Brake booster××Adjusts brake fluid pressure based on command
from ABS actuator and electric unit (control
unit).
BCM×Transmit front wiper request signal to ICC unit.
TCM××Transmits gear position signal and output shaft
revolution signal to ICC unit.

ACTION TEST
ACS-9
[ICC]
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ACTION TESTPFP:00000
ICC System Running TestEKS007YE
VEHICLE-TO-VEHICLE DISTANCE CONTROL MODE
SET CHECKING
1. Press the ON/OFF switch for less than 1.5 seconds.
2. Drive the vehicle between 25 MPH (40 km/h) and 89 MPH (144 km/h).
3. Push the COAST/SET switch.
4. Confirm that the desired speed is set as the COAST/SET switch is released.
NOTE:

When there is no vehicle ahead, drive at the set speed steadily.

When there is a vehicle ahead, control to maintain distance from the vehicle ahead, watching its speed.

The set vehicle speed is displayed on the ICC system indicator in the combination meter.
CHECK FOR INCREASE OF THE CRUISING SPEED
1. Set vehicle-to-vehicle distance control mode at desired speed.
2. Check if the set speed increases by 1 MPH (1 km/h) as ACCEL/RES switch is pushed.
NOTE:
The maximum set speed of the vehicle-to-vehicle distance control mode is 89 MPH (144 km/h).
CHECK FOR DECREASE OF THE CRUISING SPEED
1. Set vehicle-to-vehicle distance control mode at desired speed.
2. Check if the set speed decreases by 1 MPH (1 km/h) as COAST/SET switch is pushed.
NOTE:

Vehicle-to-vehicle distance control mode is automatically turned off when the driving speed lowers to 20
MPH (32 km/h) due to the deceleration of the vehicle ahead.

The minimum set speed of the vehicle-to-vehicle distance control mode is 25 MPH (40 km/h).
CHECK FOR THE CANCELLATION OF VEHICLE-TO-VEHICLE DISTANCE CONTROL MODE
(NORMAL DRIVING CONDITION) IN THE FOLLOWING CASES:
1. When the brake pedal is depressed after the system is turned on.
2. When the A/T select lever is shifted into gears other than “D”, including manual shifts.
3. When the system is turned off.
4. When CANCEL switch is operated.
CHECK FOR RESTORING THE SPEED THAT IS SET BY VEHICLE-TO-VEHICLE DISTANCE
CONTROL MODE BEFORE CANCELLATION
1. Cancel the system by depressing the brake. Then, check that the speed before cancellation is restored
when pressing ACCEL/RES switch with vehicle speed at 25 MPH (40 km/h) or above.
2. Cancel the system by shifting the select lever into other than “D”. Then, check if the speed set before the
cancellation is restored when ACCEL/RES switch is pressed.
3. Check if the speed previously set is restored when ACCEL/RES switch is operated when driving 25 MPH
(40 km/h) or above, after canceling vehicle-to-vehicle distance control mode by operating the CANCEL
switch.
CHECK ON/OFF SWITCH OPERATION
1. Start the engine. Then, check that the following operations are
performed correctly.
2. Vehicle-to-vehicle distance control mode is displayed when ON/
OFF switch is pressed ON. Vehicle-to-vehicle distance control
mode goes off when ON/OFF switch is turned to OFF.
3. Turn off the ignition switch while ON/OFF switch is ON. Turn the
ignition switch back to ON and confirm that CRUISE lamp and
ICC system display are OFF.
WKIA1978E

ACS-10
[ICC]
ACTION TEST
Revision: August 20072004 QX56
CHECK FOR ACCEL/RES, COAST/SET, CANCEL SWITCHES
1. Check if ACCEL/RES, COAST/SET, CANCEL switches operate smoothly.
2. Check if switch buttons rebound as the buttons are released.
CHECK FOR DISTANCE SWITCH
1. Start the engine.
2. Press the ON/OFF switch for less than 1.5 seconds.
3. Press the DISTANCE switch.
4. Check if the set distance indicator changes display in order of:
(long)→(middle)→(short).
NOTE:
The set distance indicator shows long immediately after the engine starts.
CONVENTIONAL (FIXED SPEED) CRUISE CONTROL MODE
SET CHECKING
1. Press the ON/OFF switch for more than 1.5 seconds.
2. Drive the vehicle between 25 MPH (40 km/h) and 89 MPH (144 km/h).
3. Push the COAST/SET switch.
4. Confirm that the desired speed is set when the COAST/SET switch is released.
NOTE:

ICC system display in the combination meter shows nothing.
SKIA6178E

ACTION TEST
ACS-11
[ICC]
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CHECK FOR INCREASE OF THE CRUISING SPEED
1. Set the conventional (fixed speed) cruise control mode at desired speed.
2. Check if the set speed increases by 1 MPH (1.6 km/h) as ACCEL/RES switch is pushed.
NOTE:

If the ACCEL/RES switch is held, the vehicle speed increases until the switch is released.

The maximum set speed is 89 MPH (144 km/h).
CHECK FOR DECREASE OF THE CRUISING SPEED
1. Set the conventional (fixed speed) cruise control mode at desired speed.
2. Check if the set speed decreases by 1 MPH (1.6 km/h) as COAST/SET switch is pushed.
NOTE:

Conventional (fixed speed) cruise control mode is automatically turned off when the driving speed lowers
to 20 MPH (32 km/h).

The lowest set speed is 25 MPH (40 km/h).
CHECK FOR THE CANCELLATION OF CONVENTIONAL (FIXED SPEED) CRUISE CONTROL
MODE (NORMAL DRIVING CONDITION) IN THE FOLLOWING CASES:
Refer to ACS-9, "CHECK FOR THE CANCELLATION OF VEHICLE-TO-VEHICLE DISTANCE CONTROL
MODE (NORMAL DRIVING CONDITION) IN THE FOLLOWING CASES:"
CHECK FOR RESTORING THE SPEED THAT IS SET BY CONVENTIONAL (FIXED SPEED)
CRUISE CONTROL MODE BEFORE ICC CANCELLATION
Refer to ACS-9, "CHECK FOR RESTORING THE SPEED THAT IS SET BY VEHICLE-TO-VEHICLE DIS-
TANCE CONTROL MODE BEFORE CANCELLATION"
CHECK ON/OFF SWITCH OPERATION
1. Start the engine. Then, check that the following operations are
performed correctly.
2. CRUISE lamp (green) illuminates and ICC system indicator
goes off when ON/OFF switch is pressed ON for more than 1.5
seconds. The CRUISE lamp goes off when ON/OFF switch is
turned to OFF.
3. Turn off the ignition switch while ON/OFF switch is ON. Turn the
ignition switch back to ON and confirm that CRUISE lamp is
OFF.
CHECK FOR ACCEL/RES, COAST/SET, CANCEL SWITCHES
1. Check if ACCEL/RES, COAST/SET, CANCEL switches operate smoothly.
2. Check if switch buttons rebound as the buttons are released.
WKIA2038E

ACS-28
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Revision: August 20072004 QX56
6. Touch “WORK SUPPORT”, “SELF-DIAG RESULTS”, “DATA
MONITOR”, "CAN DIAG SUPPORT MNTR", “ACTIVE TEST” or
“ECU PART NUMBER” on selection screen.
WORK SUPPORT
Work Item
Cause of Auto-Cancel
1. Touch “WORK SUPPORT” on the "SELECT DIAG MODE"
screen.
2. Touch “CAUSE OF AUTO-CANCEL” on the "SELECT WORK
ITEM screen.
3. Cause of automatic cancellation screen will be shown.
4. The last five causes of automatic cancellation of ICC system will
be displayed.
Possible Causes of "Auto-Cancel"
Laser Beam Adjust
For details, refer to ACS-12, "LASER BEAM AIMING ADJUSTMENT" .
SELF-DIAGNOSTIC RESULTS
For details, refer to ACS-36, "Diagnostic Trouble Code (DTC) Chart" .
WKIA2041E
Operation Function
CAUSE OF AUTO-CANCEL Indicates causes of automatic cancellation of the ICC system.
LASER BEAM ADJUST Outputs laser beam, calculates dislocation of the beam, and indicates adjustment direction.
SKIA6191E
Cause of cancellation Description
OPERATING WIPER Windshield wipers were operated at HI or LO speed operation.
OPERATING ABS ABS function was operated.
OPERATING TCS TCS function was operated.
OPERATING VDC VDC function was operated.
OPE SW VOLT CIRC Voltage outside the standard was detected.
LASER SUN BEAM Intense light such as sunlight entered ICC sensor light sensing part.
LASER TEMP Temperature around ICC sensor became low.
OP SW DOUBLE TOUCH ICC steering switches were pressed at the same time.
VDC/TCS OFF SW VDC OFF switch was pressed.
WHEEL SPD UNMATCH Wheel speed became different from AT vehicle speed.
TIRE SLIP Wheel slipped.
PKB SW ON Parking brake is applied.
IGN LOW VOLT Power supply voltage became low.
NO RECORD —

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ACS-31
[ICC]
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ICC BUZZER 1

Touch “ON” and “OFF” to check that ICC warning chime oper-
ates as in the following chart.
METER LAMP

Start engine.

Touch “ON” and “OFF” to check that ICC system displays operate as required.

The following ICC lamps will illuminate at the same time,
CRUISE (orange), CRUISE (green), SET and ICC digital dis-
play.
STOP LAMP

Touch “ON” and “OFF” to check that the stop lamps operate as
in the following chart.
BOOSTER SOL/V 3

Touch any of “MODE 1”, “MODE 2”, “MODE 3” to check that fol-
lowing operation condition is caused by operating monitor and
brake pedal.

“START” is displayed 10 seconds after operation start. (Active
test is completed.)
BUZZER O/P ON OFF
Buzzer sound Beep Not activated
SKIA1228E
METER LAMP ON OFF
All ICC system dis-
playsFull illumination OFF
SKIA1231E
STP LMP DRIVE ON OFF
Stop lamp Lamp ON Lamp OFF
SKIA1232E
SKIA1233E

ACS-32
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Revision: August 20072004 QX56
Self-Diagnostic FunctionEKS007PI
WITH CONSULT-II
1. Go to operation check after asking the customer for symptom information. Refer to ACS-9, "ACTION
TEST" .
2. Stop vehicle, turn ignition switch OFF, then connect CONSULT-II and CONSULT-II CONVERTER to data
link connector.
3. With engine started, touch “START”, “ICC”, “SELF-DIAG RESULTS” on CONSULT-II screen in this order.
CAUTION:
If “ICC” cannot be shown after several attempts, the ICC unit may be malfunctioning and should
be replaced. Refer to GI-39, "
CONSULT-II Data Link Connector (DLC) Circuit" .
4. Self-diagnostic result appears on screen. If “NO DTC ···” is shown, check ICC warning lamp. If any mal-
function is indicated, GO TO step 5.
5. Refer to ACS-36, "
Diagnostic Trouble Code (DTC) Chart" , perform appropriate check, and repair or
replace malfunctioning part as necessary.
6. Turn ignition switch OFF.
7. Start engine and touch “START”, “ICC”, “SELF-DIAG RESULT”, and “ERASE” on CONSULT-II.
CAUTION:
DTC of an existing malfunction will not erase. If the memory does not erase, go to step 5.
8. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC warning
lamp does not illuminate.
WITHOUT CONSULT-II
1. Go to operation check after asking the customer for symptom information. Refer to ACS-9, "ACTION
TEST" .
2. Stop the vehicle to start the self-diagnosis.
3. Turn ignition switch OFF.
4. Turn ignition switch ON, and wait 5 seconds. Press ACCEL/RES
switch 5 times, and then press COAST/SET switch 5 times all
within 5 seconds to start self-diagnosis.
CAUTION:

Do not start the engine.

Do not press the ICC ON/OFF switch ON.

When operation above is not completed within the 5 to 10
second window, DTC will not be displayed.

If self-diagnosis mode cannot be started after several
attempts, the ICC unit may be malfunctioning and should be
replaced. Refer to ACS-34, "
SELF-DIAGNOSIS BY ICC SYS-
TEM DISPLAY WILL NOT RUN" .
5. When self-diagnosis mode is started, DTCs are shown on set vehicle speed indicator.
PKIA0363J
WKIA1921E

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ACS-33
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CAUTION:

DTC will disappear after 5 minutes.

When multiple malfunctions are detected, a maximum of 3 code numbers can be stored; the lat-
est malfunction will be displayed first.
6. Check ACS-36, "
Diagnostic Trouble Code (DTC) Chart" , and repair or replace if necessary.
7. After repair, erase DTC stored in the ICC unit. Refer to ACS-33, "
Self-Diagnostic Erasing Method"
8. DTC 55 will be shown.
9. Turn ignition switch OFF to exit the diagnosis.
10. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC warning
lamp does not illuminate.
Self-Diagnostic Erasing Method
1. Stop the vehicle and turn the ignition switch OFF.
2. Turn ignition switch ON and start self-diagnosis.
3. During self-diagnosis mode, press CANCEL switch 5 times, and DISTANCE switch 5 times within a 10
second time period.
CAUTION:

Switch inputs must be received within a 10 second time period.

When operation is not completed within 10 seconds start again from step 1.
4. DTC 55 will be shown.
CAUTION:
DTC of an existing malfunction will not be erased.
5. Turn ignition switch OFF to exit the diagnosis.
6. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC system
warning lamp (orange) does not illuminate.
WKIA1922E

ACS-36
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: August 20072004 QX56
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSPFP:00000
Diagnostic Trouble Code (DTC) ChartEKS007X2
×:Applicable
DTC
No.CONSULT-II screen termsICC sys-
tem
warning
lampFail-safe
Malfunctions detected where...Refer-
ence
page Vehicle-
to-vehi-
cle dis-
tance
control
modeConven-
tional
(fixed
speed)
cruise
control
modeBrake
assist
(with pre-
view
function)
11 CONTROL UNIT××××

ICC unit internal malfunctionACS-37
12 VDC CONTROL UNIT××××

VDC malfunction

Brake booster signal harness is
open or shortedACS-37
20 CAN COMM CIRCUIT××××
ICC unit detected CAN communi-
cation malfunctionACS-38
31 POWER SUPPLY CIR1××××
ICC unit power supply voltage is
excessively low (less than 8V)ACS-38
34 POWER SUPPLY CIR2××××
ICC unit power supply voltage is
excessively high.ACS-38
41 VHCL SPEED SE CIRC××××

Wheel sensor malfunction

ABS actuator and electric unit
(control unit) malfunction

AT vehicle speed sensor mal-
function

TCM malfunctionACS-39
43 VDC/TCS/ABS CIRC××××
VDC/TCS/ABS system malfunc-
tionACS-39
45 BRAKE SW/ STOP L SW××××

ICC brake switch or stop lamp
switch harness is open or shorted

ICC brake switch or stop lamp
switch is stuck to OFF

ICC brake switch or stop lamp
switch is stuck to ONACS-40
46 OPERATION SW CIRC×××

ICC steering switch harness or
spiral cable is open or shorted

ICC steering switch malfunctionACS-41
74 LASER BEAM OFF CNTR×× ×
Laser beam of ICC sensor is off
the aiming pointACS-42
90 STOP LAMP RLY FIX×× ×
Normally open terminal of stop
lamp relay is stuckACS-43
92 ECM CIRCUIT××××

ECM malfunction

Accelerator pedal position sensor
malfunction

ICC unit malfunctionACS-47
96 NP RANGE×××

Park/neutral position switch har-
ness is open or shorted

Park/neutral position switch mal-
function

TCM malfunctionACS-48
97 AT CIRCUIT××
TCM malfunctionACS-48